Happy Days Season 4 Episode 17
The Third Anniversary Show
The gang organizes a surprise party for Howard and Marion's 20th anniversary as clips from previous episodes are shown.
4 - 25Fonzie's BaptismMar. 29, 1977- 4 - 24The Last of the Big Time MalphsMar. 22, 1977
- 4 - 23Spunky Come HomeMar. 15, 1977
- 4 - 22Fonz-How, Inc.Mar. 08, 1977
- 4 - 21Joanie's Weird BoyfriendMar. 01, 1977
- 4 - 20The PhysicalFeb. 22, 1977
- 4 - 19Graduation (2)Feb. 15, 1977
- 4 - 18Graduation (1)Feb. 08, 1977
- 4 - 17The Third Anniversary ShowFeb. 04, 1977
- 4 - 16Marion RebelsFeb. 01, 1977
- 4 - 15A Shot in the DarkJan. 25, 1977
- 4 - 14The Book of RecordsJan. 18, 1977
- 4 - 13Time CapsuleJan. 11, 1977
- 4 - 12Fonzie's Old LadyJan. 04, 1977
- 4 - 11Richie Branches OutDec. 07, 1976
- 4 - 10A.K.A. the FonzNov. 30, 1976
- 4 - 9The MuckrakersNov. 23, 1976
- 4 - 8They Shoot Fonzies, Don't They?Nov. 16, 1976
- 4 - 7A Place of His OwnNov. 09, 1976
- 4 - 6Fonzie's HeroOct. 26, 1976
- 4 - 5Fonzie the FatherOct. 19, 1976
- 4 - 4A Mind of His OwnOct. 05, 1976
- 4 - 3Fonzie Loves Pinky (3)Sep. 28, 1976
- 4 - 2Fonzie Loves Pinky (2)Sep. 21, 1976
- 4 - 1Fonzie Loves Pinky (1)Sep. 21, 1976
